package cn.edkuir.cart.controller;

import cn.edkuir.cart.interceptor.CartInterceptor;
import cn.edkuir.cart.service.CartService;
import cn.edkuir.cart.vo.CartItem;
import cn.edkuir.cart.vo.CartVo;
import cn.edkuir.cart.vo.UserInfoTo;
import cn.edkuir.common.constant.AuthServerConstant;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.util.List;
import java.util.concurrent.ExecutionException;

@Controller
public class CartController {
    @Autowired
    private CartService cartService;

    /**
     * 浏览器有一个cookie: user-key, 用来标识用户的身份, 一个月后过期
     * 如果第一次使用购物车, 都会给一个临时的用户身份, 浏览器以后每次访问都会带上这个user-key
     * 登录: session有
     * 没登录: 如果没有临时用户, 创建一个
     */
    @GetMapping("cart.html")
    public String cartList(HttpSession session, Model model) throws ExecutionException, InterruptedException {
        CartVo cartVo = cartService.getCart();
        model.addAttribute("cart", cartVo);

        return "cartList";
    }


    /**
     * 添加商品到购物车
     * redirectAttributes.addAttribute(): 将数据拼接在url后面
     * redirectAttributes.addFlashAttribute(): 将数据放在session里面, 可以在页面中取出, 但是只能取一次
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes redirectAttributes) throws ExecutionException, InterruptedException {
        cartService.addToCart(skuId, num);
        redirectAttributes.addAttribute("skuId", skuId);

        return "redirect:http://cart.mall.com/addToCartSuccess.html";
    }


    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId, Model model) {
        //重定向到成功页面, 再次查询购物车数据
        CartItem cartItem = cartService.getCartItem(skuId);
        model.addAttribute("item", cartItem);

        return "success";
    }


    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId, @RequestParam("check") Integer check) {
        cartService.check(skuId, check);

        return "redirect:http://cart.mall.com/cart.html";
    }


    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num) {
        cartService.count(skuId, num);

        return "redirect:http://cart.mall.com/cart.html";
    }


    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId) {
        cartService.delete(skuId);

        return "redirect:http://cart.mall.com/cart.html";
    }



    @GetMapping("/currentUserCartItems")
    @ResponseBody
    public List<CartItem> getCurrentUserCartItems() {
        return cartService.getCurrentUserCartItems();
    }

}
